How Many Electrons Does Mg2 + Have?
Unit 1: Introduction to Biochemistry
Lesson 1-4: Key Question
How many electrons does Mg2+ have? (1 mark)
Mg2+ has 10 electrons. A magnesium atom has 12 electrons with 2 of the 12 being valence electrons. Therefore the atom will lose the valence electrons which are located on the outermost shell to stabilize itself (outermost shell) as atoms tend to do what it easiest. Since magnesium lost 2 electrons it becomes positive as it is giving away electrons to stabilize other atoms. Hence magnesium then becomes Mg2+ because it lost 2 of the 12 electrons.
Given that the half-life of the radioisotope Carbon -14 is 5730 years. How useful do you think the isotope would be for dating bones that are over a million years? (2 marks)
Living plants and animals incorporate Carbon -1 into their tissues …show more content…
The results you would expect to find (2marks)
Using the Benedict’s regeant tests, once the blue reagent was added to the chocolate milk color, the color would change according to the sugar percentage. The chocolate milk would change from light green, to green/yellow, orange or from red to brown. A sample of the chocolate milk would change to a red color for the lipids present and also another sample of the chocolate milk would change to a deep purple once the Biuret’s reagent is added from the protein in the chocolate milk.
Explain how an enzyme catalyzes the synthesis of a large molecule from two smaller molecules.
Explain how the following environmental factors affect enzyme activity:
PH: ph affects the activity of enzymes as they always have a range of ph where they function optimally. At an extreme ph valve, the enzyme will break down/ denature. This means the enzyme will begin to come apart and no longer be able to function
Lesson 1-4: Key Question
How many electrons does Mg2+ have? (1 mark)
Mg2+ has 10 electrons. A magnesium atom has 12 electrons with 2 of the 12 being valence electrons. Therefore the atom will lose the valence electrons which are located on the outermost shell to stabilize itself (outermost shell) as atoms tend to do what it easiest. Since magnesium lost 2 electrons it becomes positive as it is giving away electrons to stabilize other atoms. Hence magnesium then becomes Mg2+ because it lost 2 of the 12 electrons.
Given that the half-life of the radioisotope Carbon -14 is 5730 years. How useful do you think the isotope would be for dating bones that are over a million years? (2 marks)
Living plants and animals incorporate Carbon -1 into their tissues …show more content…
The results you would expect to find (2marks)
Using the Benedict’s regeant tests, once the blue reagent was added to the chocolate milk color, the color would change according to the sugar percentage. The chocolate milk would change from light green, to green/yellow, orange or from red to brown. A sample of the chocolate milk would change to a red color for the lipids present and also another sample of the chocolate milk would change to a deep purple once the Biuret’s reagent is added from the protein in the chocolate milk.
Explain how an enzyme catalyzes the synthesis of a large molecule from two smaller molecules.
Explain how the following environmental factors affect enzyme activity:
PH: ph affects the activity of enzymes as they always have a range of ph where they function optimally. At an extreme ph valve, the enzyme will break down/ denature. This means the enzyme will begin to come apart and no longer be able to function